Apparatus for applying liquid droplets to a surface by using a high speed laminar air flow to accelerate the same

摘要

Apparatus for applying droplets of colored liquid to a surface includes a chamber divided into a liquid chamber portion and an air chamber portion. The liquid chamber portion includes an intake channel connected to a liquid supply container and a discharge channel through which the liquid is discharged for deposition on the surface. A pressure producing means is in contact with the liquid chamber portion to produce periodic pressure increases in the liquid in the chamber portion to eject it through the discharge channel to the atmosphere in a series of droplets. The air chamber portion includes an intake channel connected to a source of pressurized air and a discharge channel axially aligned with the discharge channel of the liquid chamber portion to allow the air to be discharged therethrough to the atmosphere at a high speed. The liquid droplets are thus discharged through the two axially aligned discharged channels and accelerated by the stream of air along their passage to the surface.